hole drift current 空穴漂移电流
hole drift mobility 空穴漂移迁移率
deep hole drift 深孔钻头
·2,447,543篇论文数据，部分数据来源于NoteExpress
Over the course of the next few hundred million years, the two black holes in NGC 6240, which are about 3, 000 light-years apart, will drift towards one another and merge to form an even larger supermassive black hole.
BBC: Black holes on collision course
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